| http://www.w3.org/ns/prov#value | - Therefore, there was a problem that the rapid increase in a heart rate occurs for a heart failure patient even in minimal exertion and he cannot continue exertion such that he feels palpitation, fatigue and the like owing to a fact that the pump function of the ventricle cannot follow this increase of a heart rate. [0013] Further, the stimulation voltage of the left ventricle is generally set at a
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